The monsters have a common appearance - mystical armor possessed by a specific elemental spirit that all have multiple lightning strikes in their backgrounds.

Their Trigger Effects can also be seen as mirroring the effects of powerful Spell and Trap Cards from the game's past that were Forbidden at least once. This theory was actually confirmed on Konami's Official Strategy Site[1], discrediting the fan-favorite theory of them representing new takes of the "Spiritual Art" series of Trap Cards.